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    A laboratory model of splash-form tektites

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    Author
    Elkins-Tanton, L. T.
    Aussillous, P.
    Bico, J.
    Quéré, D.
    Bush, J. W. M.
    Issue Date
    2003-01-01
    Keywords
    Fluid dynamics
    rotation
    Splash-form
    Tektites
    
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    Citation
    Elkins-Tanton, L. T., Aussillous, P., Bico, J., Quéré, D., & Bush, J. W. M. (2003). A laboratory model of splash‐form tektites. Meteoritics & Planetary Science, 38(9), 1331-1340.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656676
    DOI
    10.1111/j.1945-5100.2003.tb00317.x
    Additional Links
    https://meteoritical.org/
    Abstract
    Splash-form tektites are generally acknowledged to have the form of bodies of revolution. However, no detailed fluid dynamical investigation of their form and stability has yet been undertaken. Here, we review the dynamics and stability of spinning, translating fluid drops with a view to making inferences concerning the dynamic history of tektites. We conclude that, unless the differential speed between the molten tektite and ambient is substantially less than the terminal velocity, molten tektites can exist as equilibrium bodies of revolution only up to sizes of 3 mm. Larger tektites are necessarily non-equilibrium forms and so indicate the importance of cooling and solidification during flight. An examination of the shapes of rotating, translating drops indicates that rotating silicate drops in air will assume the shapes of bodies of rotation if their rotational speed is 1% or more of their translational speed. This requirement of only a very small rotational component explains why most splash-form tektites correspond to bodies of revolution. A laboratory model that consists of rolling or tumbling molten metallic drops reproduces all of the known forms of splash- form tektites, including spheres, oblate ellipsoids, dumbbells, teardrops, and tori. The laboratory also highlights important differences between rolling drops and tumbling drops in flight. For example, toroidal drops are much more stable in the former than in the latter situation.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2003.tb00317.x
    Scopus Count
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    Meteoritics & Planetary Science, Volume 38, Number 9 (2003)

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